Package com.landawn.abacus.util

Class If

java.lang.Object

com.landawn.abacus.util.If

@Beta
public final class If
extends Object

This class is mainly designed for functional programming. Generally the traditional "if-else" or ternary operator: "? : " is preferred over this class.

Author:

HaiYang Li

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	If.OrElse	The Class OrElse.

Method Summary

Modifier and Type	Method	Description
static If	exists(int index)	true for index >= 0, false for index < 0.
static If	is(boolean b)	Checks if is.
static If	isNullOrEmpty(boolean[] a)	Checks if is null or empty.
static If	isNullOrEmpty(byte[] a)	Checks if is null or empty.
static If	isNullOrEmpty(char[] a)	Checks if is null or empty.
static If	isNullOrEmpty(double[] a)	Checks if is null or empty.
static If	isNullOrEmpty(float[] a)	Checks if is null or empty.
static If	isNullOrEmpty(int[] a)	Checks if is null or empty.
static If	isNullOrEmpty(long[] a)	Checks if is null or empty.
static If	isNullOrEmpty(short[] a)	Checks if is null or empty.
static If	isNullOrEmpty(LongMultiset<?> s)	Checks if is null or empty.
static If	isNullOrEmpty(Multimap<?,?,?> m)	Checks if is null or empty.
static If	isNullOrEmpty(Multiset<?> s)	Checks if is null or empty.
static If	isNullOrEmpty(PrimitiveList list)	Checks if is null or empty.
static If	isNullOrEmpty(CharSequence s)	Checks if is null or empty.
static If	isNullOrEmpty(Object[] a)	Checks if is null or empty.
static If	isNullOrEmpty(Collection<?> c)	Checks if is null or empty.
static If	isNullOrEmpty(Map<?,?> m)	Checks if is null or empty.
static If	isNullOrEmptyOrBlank(CharSequence s)	Checks if is null or empty or blank.
static If	not(boolean b)
static If	notNullOrEmpty(boolean[] a)	Not null or empty.
static If	notNullOrEmpty(byte[] a)	Not null or empty.
static If	notNullOrEmpty(char[] a)	Not null or empty.
static If	notNullOrEmpty(double[] a)	Not null or empty.
static If	notNullOrEmpty(float[] a)	Not null or empty.
static If	notNullOrEmpty(int[] a)	Not null or empty.
static If	notNullOrEmpty(long[] a)	Not null or empty.
static If	notNullOrEmpty(short[] a)	Not null or empty.
static If	notNullOrEmpty(LongMultiset<?> s)	Not null or empty.
static If	notNullOrEmpty(Multimap<?,?,?> m)	Not null or empty.
static If	notNullOrEmpty(Multiset<?> s)	Not null or empty.
static If	notNullOrEmpty(PrimitiveList list)	Not null or empty.
static If	notNullOrEmpty(CharSequence s)	Not null or empty.
static If	notNullOrEmpty(Object[] a)	Not null or empty.
static If	notNullOrEmpty(Collection<?> c)	Not null or empty.
static If	notNullOrEmpty(Map<?,?> m)	Not null or empty.
static If	notNullOrEmptyOrBlank(CharSequence s)	Not null or empty or blank.
<E extends Throwable> If.OrElse	then(Throwables.Runnable<E> cmd)
<U, E extends Throwable> If.OrElse	then(U init, Throwables.Consumer<? super U,E> action)
If.OrElse	thenDoNothing()	Then do nothing.
<E extends Throwable> If.OrElse	thenThrow(Supplier<? extends E> exceptionSupplier)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

is

public static If is(boolean b)

Checks if is.

Parameters:

b -

Returns:

not

public static If not(boolean b)

Parameters:

b -

Returns:

exists

public static If exists(int index)

true for index >= 0, false for index < 0.

Parameters:

index -

Returns:

isNullOrEmpty

public static If isNullOrEmpty(CharSequence s)

Checks if is null or empty.

Parameters:

s -

Returns:

isNullOrEmpty

public static If isNullOrEmpty(boolean[] a)

Checks if is null or empty.

Parameters:

a -

Returns:

isNullOrEmpty

public static If isNullOrEmpty(char[] a)

Checks if is null or empty.

Parameters:

a -

Returns:

isNullOrEmpty

public static If isNullOrEmpty(byte[] a)

Checks if is null or empty.

Parameters:

a -

Returns:

isNullOrEmpty

public static If isNullOrEmpty(short[] a)

Checks if is null or empty.

Parameters:

a -

Returns:

isNullOrEmpty

public static If isNullOrEmpty(int[] a)

Checks if is null or empty.

Parameters:

a -

Returns:

isNullOrEmpty

public static If isNullOrEmpty(long[] a)

Checks if is null or empty.

Parameters:

a -

Returns:

isNullOrEmpty

public static If isNullOrEmpty(float[] a)

Checks if is null or empty.

Parameters:

a -

Returns:

isNullOrEmpty

public static If isNullOrEmpty(double[] a)

Checks if is null or empty.

Parameters:

a -

Returns:

isNullOrEmpty

public static If isNullOrEmpty(Object[] a)

Checks if is null or empty.

Parameters:

a -

Returns:

isNullOrEmpty

public static If isNullOrEmpty(Collection<?> c)

Checks if is null or empty.

Parameters:

c -

Returns:

isNullOrEmpty

public static If isNullOrEmpty(Map<?,?> m)

Checks if is null or empty.

Parameters:

m -

Returns:

isNullOrEmpty

public static If isNullOrEmpty(PrimitiveList list)

Checks if is null or empty.

Parameters:

list -

Returns:

isNullOrEmpty

public static If isNullOrEmpty(Multiset<?> s)

Checks if is null or empty.

Parameters:

s -

Returns:

isNullOrEmpty

public static If isNullOrEmpty(LongMultiset<?> s)

Checks if is null or empty.

Parameters:

s -

Returns:

isNullOrEmpty

public static If isNullOrEmpty(Multimap<?,?,?> m)

Checks if is null or empty.

Parameters:

m -

Returns:

isNullOrEmptyOrBlank

public static If isNullOrEmptyOrBlank(CharSequence s)

Checks if is null or empty or blank.

Parameters:

s -

Returns:

notNullOrEmpty

public static If notNullOrEmpty(CharSequence s)

Not null or empty.

Parameters:

s -

Returns:

notNullOrEmpty

public static If notNullOrEmpty(boolean[] a)

Not null or empty.

Parameters:

a -

Returns:

notNullOrEmpty

public static If notNullOrEmpty(char[] a)

Not null or empty.

Parameters:

a -

Returns:

notNullOrEmpty

public static If notNullOrEmpty(byte[] a)

Not null or empty.

Parameters:

a -

Returns:

notNullOrEmpty

public static If notNullOrEmpty(short[] a)

Not null or empty.

Parameters:

a -

Returns:

notNullOrEmpty

public static If notNullOrEmpty(int[] a)

Not null or empty.

Parameters:

a -

Returns:

notNullOrEmpty

public static If notNullOrEmpty(long[] a)

Not null or empty.

Parameters:

a -

Returns:

notNullOrEmpty

public static If notNullOrEmpty(float[] a)

Not null or empty.

Parameters:

a -

Returns:

notNullOrEmpty

public static If notNullOrEmpty(double[] a)

Not null or empty.

Parameters:

a -

Returns:

notNullOrEmpty

public static If notNullOrEmpty(Object[] a)

Not null or empty.

Parameters:

a -

Returns:

notNullOrEmpty

public static If notNullOrEmpty(Collection<?> c)

Not null or empty.

Parameters:

c -

Returns:

notNullOrEmpty

public static If notNullOrEmpty(Map<?,?> m)

Not null or empty.

Parameters:

m -

Returns:

notNullOrEmpty

public static If notNullOrEmpty(PrimitiveList list)

Not null or empty.

Parameters:

list -

Returns:

notNullOrEmpty

public static If notNullOrEmpty(Multiset<?> s)

Not null or empty.

Parameters:

s -

Returns:

notNullOrEmpty

public static If notNullOrEmpty(LongMultiset<?> s)

Not null or empty.

Parameters:

s -

Returns:

notNullOrEmpty

public static If notNullOrEmpty(Multimap<?,?,?> m)

Not null or empty.

Parameters:

m -

Returns:

notNullOrEmptyOrBlank

public static If notNullOrEmptyOrBlank(CharSequence s)

Not null or empty or blank.

Parameters:

s -

Returns:

thenDoNothing

public If.OrElse thenDoNothing()

Then do nothing.

Returns:

then

public <E extends Throwable> If.OrElse then(Throwables.Runnable<E> cmd)
                                     throws E

Type Parameters:

E -

Parameters:

cmd -

Returns:

Throws:

E - the e

then

public <U,
E extends Throwable> If.OrElse then(U init,
 Throwables.Consumer<? super U,E> action)
                                       throws E

Type Parameters:

U -

E -

Parameters:

init -

action -

Returns:

Throws:

E - the e

thenThrow

public <E extends Throwable> If.OrElse thenThrow(Supplier<? extends E> exceptionSupplier)
                                          throws E

Type Parameters:

E -

Parameters:

exceptionSupplier -

Returns:

Throws:

E - the e